Entities with compound primary keys are not properly handled when querying metamodel and using Criteria API ----------------------------------------------------------------------------------------------------------- Key: HHH-5938 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5938 Project: Hibernate Core Issue Type: Bug Affects Versions: 3.6.0 Reporter: Jaroslaw Lewandowski Suppose we have entity defined like this: {code} @Entity class Foo { @Id Long first; @Id Long second; .... } {code} Then the following code will fail: {code} Metamodel mm = entityManager.getMetamodel(); EntityType<Foo> foo_ = mm.entity(Foo.class); foo_.getSingularAttribute("first", Long.class); foo_.getSingularAttribute("second", Long.class); {code} The same problems exists trying to query this entity: {code} CriteriaBuilder cb = entityManager.getMetamodel(); CriteriaQuery<Foo> cq = cb.createQuery(Foo.class); Root<Foo> foo = cq.from(Foo.class); cq.where(cb.equal(foo.get("first"), 1L), cb.equal(foo.get("second"), 2L)); {code} See that attributes are accessed by name. In the first example IllegalArgumentException is thrown in second NPE -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://opensource.atlassian.com/projects/hibernate/secure/Administrators.... - For more information on JIRA, see: http://www.atlassian.com/software/jira